JP2010275057A - Crane power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crane power supply system capable of reducing the operational frequency for disconnecting/connecting a crane from/to a power supply apparatus when changing the lane of the crane, and facilitating the operation even when the operation is present. <P>SOLUTION: The crane power supply system having a portal yard crane for handling a container, a power supply rail 11 installed along a lane on which the container is loaded, and a power supply truck 20 suspended by the crane has a cargo handling unit in which the power supply rail 11 is installed along the lane, and a guide rail 12 for guiding the travel of the power supply truck 20 is installed, a connection part in which the guide rail 12 is installed along the lane, and a lane change unit having the ends of the power supply rail 11 and the guide rail 12. The cargo handling unit supplies the power to the crane from the power supply rail 11 via the power supply truck 20, and the lane change unit supplies power to the crane from a secondary battery or an engine generator installed inside the crane. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a power supply system for a gate-type yard crane used for container handling at a port or an inland container terminal.

  At container terminals such as harbors and inland areas, containers are handled between ships and trailers by container cranes. FIG. 8 shows a schematic view of the container terminal 2 of the port. The marine transport container 5 transported by the container ship 35 is loaded on the trailer 36 by the quay crane 34, the trailer 36 moves to the container mounting block 4 (4A, 4B, 4C, etc.), and the loaded container 5 is It moves to the container mounting block 4 by the portal crane 30X. In addition, the cargo handling work such as transporting the container 5 to the destination of the cargo while carrying the container 5 on the trailer 36 is performed.

  The container mounting block 4 is divided into a plurality of lanes L (L1, L2, L3, L4). For example, in FIG. 8, a first lane L1 including two blocks 4A and 4B and blocks 4C and 4D are provided. The container terminal 2 includes a second lane L2 made up of, a third lane L3 made up of a block 4E, and a fourth lane L4 made up of a block 4F. The breaks of the blocks (for example, 4A and 4B) and the lane change unit 6 that is the end of the block are a traveling path of the trailer 36 and the like.

  In addition, the portal crane 30X may move between lanes because of the necessity of leveling the work amount for each crane for the purpose of improving the efficiency of cargo handling, and the lane change unit 6 is used as a travel path for moving the crane 30X. I use it.

  In recent years, the energy source of the portal crane 30X is being switched from a diesel generator mounted on the crane to a land power supplied from the container terminal 2 in consideration of the environment. For example, a method is disclosed in which props are set up along the traveling direction of a traveling lane L of the crane, and a trolley wire is arranged between the props so that power of the crane is supplied from the trolley wire (for example, Patent Document 1). reference).

  FIG. 9 shows an outline of a power feeding system for another crane that uses land electric power. A crane 30X having a trolley 31 and a spreader 32 for handling cargo is provided with a power supply carriage 20X installed on a power feeding facility 10X so as to be able to travel. Are connected by a connection cable 33. Electricity is supplied to the crane 30X from the power supply rail 11X of the power supply facility 10X via the power supply carriage 20X.

JP 2003-137494 A

However, the apparatus described in Patent Document 1 has a function of moving the crane 30A to another lane (L1 to L2) as shown in FIG. The power supply facility 10X (the power supply trolley wire) that hinders the traveling of 36 cannot be installed. Further, even when the crossing part 7 is moved between the same lanes (for example, from the block 4A to the block 4B in FIG. 10), the power supply carriage 20X is released from the power supply facility 10X of the movement source, and the alignment is performed again. Later, it must be reconnected to another power supply facility 10X at the destination.

  In addition, when the current collector (power supply carriage 20X) described in Patent Document 1 is connected to a power supply trolley wire (power supply facility 10X), a cylinder that operates hydraulically or electrically from the crane side is used each time. Since it is necessary to accurately align the horizontal direction and the horizontal direction, there is a problem that time loss occurs. Furthermore, even when the current collector is moved while connected to the power supply trolley wire, the current collector must be kept pressed against the power supply trolley wire by an external force, and high-precision control is essential. is there.

  Moreover, since the support part of the current collector is the central part in the height direction due to the mechanism, an opening is required in the central part in the height direction of the power supply trolley wire, and leakage occurs due to rainwater entering from there. Have a problem.

  Further, considering the lane change of the crane 30X shown in FIG. 9, as a first example, the container terminal 2 has two blocks (4A and 4B) as shown in FIG. 10, each of the first lane L1 and the second lane L2. 4C and 4D), the crane 30X can perform a lane change from the first lane L1 to the second lane L2 using the lane change unit 6 or the crossing unit 7. However, also in the transition part 7 when moving from the block 4A to the block 4B in the first lane L1, it is necessary to perform the work of opening and connecting the connection cable 33 as in the case of the lane change, which is inefficient.

  As a second example, each of the blocks (4E, 4E, 4L, L4, L4, L4, L4, L4, L4, L4, L4, L4, L4) 4F) (see FIG. 8), the crane 30C needs to move to the end of the lane when performing a lane change from the third lane L3 to the fourth lane L4, and has a slow speed of about 8 km / h. It takes a lot of time to run the crane to the end in the vast container terminal 2, which leads to inefficiency in cargo handling work.

  The present invention has been made in view of the above-described situation, and the purpose of the present invention is to reduce the operation frequency of opening and connecting the crane and power supply equipment when changing the lane of the crane when supplying power to the crane used in the container terminal. It is to provide a crane power feeding system that reduces and facilitates work.

  In order to achieve the above object, a crane power feeding system according to the present invention includes a portal yard crane for handling a marine transport container, a power feeding rail laid along a lane on which the container is placed, and a suspension for the crane. In the crane power supply system having the power supply carriage, the power handling rail is installed along the lane, and the cargo handling section is provided with a guide rail that guides the traveling of the power supply truck, And a lane change part having an end of the power supply rail and the guide rail. The cargo handling part supplies power to the crane from the power supply rail via the power supply carriage. In the lane change part and the crossing part, the crane is installed from a secondary battery or an engine generator installed in the crane. Characterized by being configured to power.

  With this configuration, the crane can receive power from the power supply rail through which the electricity flows through the connected power supply cart. Therefore, when the lane changes, the power supply cart that moves following the crane and the power supply rail By performing alignment, power can be easily supplied. The above-described alignment between the power supply rail and the power supply carriage can be performed by installing a sensor or the like on the power supply carriage.

  In the above crane power supply system, the conductive portion of the power supply rail is configured to face downward, and an insulator guide is installed at an end of the power supply rail, and the insulator guide is half-cylindrical and one of The power feeding arm, which is formed of an expanded insulator and is installed upward on the power feeding carriage, is configured to be guided to the conductive portion via the insulator guide.

  When the insulator guide is installed in the transition part and the lane change part which are the ends of the power supply rail, when moving from the transition part to the cargo handling part or when moving from the lane change part to the cargo handling part, The power feeding arm can be smoothly guided to and brought into contact with the power feeding rail. That is, since the power supply arm can be easily reconnected as the crane moves, the crane can be moved smoothly. In addition, the use of an insulator guide made of an insulator prevents an operator from inadvertently touching and receiving an electric shock, thereby improving safety.

  In the above crane power feeding system, the guide rail is configured to have a height at which a vehicle carrying the crane and the container can pass vertically and horizontally on the guide rail.

  This guide rail has a height (preferably 5 cm or less) that allows the crane and trailer to carry the container to pass freely, so that power can be supplied without interfering with the traffic inside the container terminal (especially the lane change section). The cart can be guided.

  In the crane power feeding system, a guide for guiding the power feeding carriage to the guide rail is installed at an end of the guide rail.

  By installing the guide at the lane change part that is the end of this guide rail, when the crane that has changed lanes is moved from the lane change part to the cargo handling part, the power supply carriage can be smoothly guided to the guide rail. . That is, there is no need to precisely position the power supply carriage during a lane change. For this reason, the power supply carriage can be automatically guided onto the guide rail without being influenced by the level of proficiency of the crane operator, and accordingly, the power supply arm can be guided to the power supply rail. The crane can be connected. Moreover, the structure which installs a guide in a crossover part can perform the lane change of a crane in a crossover part.

  In the crane power supply system, the power supply rail is covered with a power supply rail cover in the entire area of the power supply rail installed in the cargo handling section, and a suspension part that connects the power supply carriage and the crane to a part of the power supply rail cover It is characterized in that a slit is formed for passing through.

  With this configuration, in the container terminal, it is possible to prevent accidents such as accidents caused by workers coming into contact with the power supply rails and leakage due to rainwater. In addition, by configuring the cover of the power supply rail (power supply rail cover) with a material having high strength, it is possible to use the cover of the power supply rail as a passage.

  For example, considering the case where cranes traveling on adjacent lanes pass each other, the distance between the cranes is 1 m or less. At this time, if the upper surface of the power supply rail cover between the cranes is configured as a passage, the worker can retreat onto the passage, so that the safety of the worker can be ensured. In addition, when an operator gets on the crane, the operator can get on the crane using the power supply rail cover as a foothold, so that the worker can move smoothly.

  A lane change method in a crane power supply system according to the present invention for achieving the above object is a crane lane change method in the crane power supply system, and includes a secondary battery or an engine generator installed in the crane. The step of ascending the power supply carriage suspended on the crane by the lane change part, the step of moving the crane to a target lane, the lowering of the power supply carriage to the lane change part, and the crane Moving along the lane, guiding the power supply carriage onto the guide rail, then guiding the power supply arm to the power supply rail, bringing the power supply arm into contact with the power supply rail, and The method has a step of resuming power supply. With this configuration, it is possible to obtain the same effects as those of the crane power feeding system described above.

  In addition, by making the suspension part (lift mechanism) connecting the power supply carriage and the crane flexible, the left and right deviation (traveling deviation, etc., x direction in FIG. 8) with respect to the traveling direction of the crane, and the influence of vibration Can be prevented from reaching the power supply carriage, and stable electrical contact can be realized.

  Specifically, for example, when the crane is traveling, when it deviates in the direction away from the power supply facility (x direction) (travel deviation), the lift mechanism provided with an expansion / contraction mechanism prevents the crane from shifting to the power supply carriage. can do. Moreover, with respect to the vibration of the crane in the vertical direction, by adopting a configuration in which the lift mechanism swings in the vertical direction, the power supply carriage always comes into contact with the power supply rail, and a stable electrical connection can be realized.

  According to the crane power supply system according to the present invention, the crane can receive power from the power supply rail through which electricity flows through the connected power supply carriage, and therefore, the lane change moves following the crane. The power supply can be easily received by positioning the power supply carriage and the power supply rail of the power supply facility. For this reason, it is not necessary to perform the connecting operation of the connection cable between the conventional crane and the power supply carriage. The above-described alignment between the power supply rail and the power supply carriage can be performed by installing a sensor or the like on the power supply carriage.

  In addition, since the power supply arm of the power supply carriage has a suspension mechanism, the contact receiving power is always pressed against the power supply rail, and the stability of the electrical contact between the power supply carriage and the power supply rail is improved. be able to. Moreover, since the guide rail which guides a feed trolley is comprised at the almost same height as a yard surface, it does not disturb the traffic of the crane and trailer in a container terminal.

It is the figure which showed the electric power feeding installation of the crane electric power feeding system of embodiment which concerns on this invention. It is the figure which showed the electric power feeding installation and electric power feeding trolley of the crane electric power feeding system of embodiment which concerns on this invention. It is the figure which showed the electric power feeding arm of the crane electric power feeding system of embodiment which concerns on this invention. It is the figure which showed the electric power feeding installation and electric power feeding trolley of the crane electric power feeding system of embodiment which concerns on this invention. It is a figure which shows the structure of the insulator guide of the crane electric power feeding system of embodiment which concerns on this invention. It is a figure which shows the outline of the lane change of the crane electric power feeding system of embodiment which concerns on this invention. It is a figure which shows the outline of the lane change of the crane electric power feeding system of embodiment which concerns on this invention. It is a figure which shows an example of the container terminal which employ | adopted the conventional crane electric power feeding system. It is a figure which shows an example of the conventional crane electric power feeding system. It is the figure which showed the movement path | route of the crane in the conventional crane electric power feeding system.

  Hereinafter, a crane power supply system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a power supply facility 10 of a crane power supply system 1 according to an embodiment of the present invention. FIG. 1A is a power supply facility in the case of a single-phase power source such as a DC power source, and FIG. The power supply equipment in the case of phase alternating current is shown. The power supply facility 10 has a groove in the ground 3 and has a guide rail 12 laid in the inside thereof and a power supply rail 11 having a conductive portion opposed to the guide rail 12 so that the power supply carriage travels between them. It is configured. Further, the outside of the guide rail 12 and the power supply rail 11 is covered with a power supply rail cover 13, and a part thereof is opened as a slit 14.

  Here, by covering the power supply rail 11 with the power supply rail cover 13, it is possible to prevent an accident in which an operator working at the container terminal 2 inadvertently touches the conductive portion of the power supply rail 11 and receives an electric shock. The influence of rain and the like can be suppressed, and the occurrence of leakage etc. can be suppressed. Incidentally, the slit 14 is an opening through which a lift mechanism (suspension part) that connects the power supply carriage and the crane passes.

  FIG. 2 is a perspective view showing the relationship between the power supply facility 10 and the power supply carriage 20, and the power supply carriage 20 is configured to be able to travel by the traveling wheels 24 along the guide rails 12 laid on the ground 3. A power supply arm 21 is installed at the upper part of the power supply carriage 20, and a contact 22 is installed at the end thereof. The contact 22 is configured to contact the conductive portion of the power supply rail 11, receive electricity from the power supply rail 11, and send this electricity to the crane. In order to stabilize the electrical contact between the contact 22 and the power supply rail 11, the power supply arm 21 has a suspension mechanism 23. The contact mechanism 22 is always pressed against the power supply rail 11 by the suspension mechanism 23. Is given the power of.

  FIG. 3 shows a different embodiment of the power supply arm 21, which has a structure in which the contact 22 is pressed against the power supply rail 11 via the power supply arm 21 </ b> A. The power supply arm 21A has suspension mechanisms 23A and 23B. Thus, one power supply arm 21A can be installed and used on the power supply carriage 20, and two power supply arms 21 can be used as shown in FIG.

  Here, although the installation position of the power supply rail 11 has been described above, the power supply arm (21, 21A, 21B) is installed so that the power supply rail 11 is installed in the side surface direction and the contact 22 is pressed against the power supply rail 11. It can also be set as the structure to install.

  FIG. 4 is a sectional view showing the positional relationship between the power supply facility 10 shown in FIG. 1 and the power supply carriage 20. In the power supply facility 10, the contact 22 of the power supply carriage 20 is configured to always come into contact with the power supply rail 11, and has an action like a pantograph of a train.

  The lift mechanism 25 includes a plurality of links, and a cylinder device 26a that performs vertical alignment (z-axis direction) of the power supply carriage 20 and a cylinder that performs left-right alignment (x-axis direction) of the power supply carriage 20. It has a device 26b.

  The power supply carriage 20 is always connected to the crane 30 by the lift mechanism 25. That is, in the conventional crane power supply system shown in FIG. 9, the connection cable 33 that connects the crane 30X and the power supply carriage 20X is opened at every lane change. The power supply carriage 20 remains connected to the crane 30 at the lane change.

  Further, the power supply rail cover 13 may be formed of a high strength member, and the upper surface may be used as a passage for movement of the worker. When the power supply rail cover 13 is not installed, when the worker goes up to the crane 30, the power supply rail cover 13 passes through the vicinity of the power supply section such as the power supply rail 11, which is dangerous. That is, the lift mechanism 25, the power supply facility 10, and the like are obstacles to the movement of the worker because the ladder and the like installed on the crane 30 are raised from between the crane 30 and the power supply facility 10. On the other hand, when the power supply facility 10 is used as a moving path, the worker can move on the power supply facility 10 and can directly go up the ladder of the crane 30 from the vicinity of the crane 30. Therefore, the worker can move safely without being affected by the energization unit and the lift mechanism 25.

  FIG. 5 shows an outline in which the power supply carriage 20 advances from the right to the left in FIG. 5 during the lane change, and the contact between the contact 22 and the power supply rail 11 is realized in the process. The power supply carriage 20 in a state where no power is supplied from the power supply facility 10, that is, the power supply arm 21 of the power supply carriage 20 when the crane 30 freely travels on the ground 3 is operated by the spring of the suspension mechanism 23. It has been awakened. The power feeding arm 21 and the contact 22 are configured so as to be brought into contact with the power supply rail 11 by a megaphone-like insulator guide 15 having a semi-cylindrical shape and a wide entrance. With this insulator guide 15, the power feeding arm 21 is tilted, and the spring of the suspension mechanism 23 is extended accordingly, and the contact 22 can be pressed against the power feeding rail 11 by this force.

  The insulator guide 15 facilitates the alignment of the power supply equipment 10 and the power supply carriage 20 in the destination lane when the crane 30 changes the lane. That is, even if the position of the contact 22 of the power supply carriage 20 and the position of the power supply rail 11 are not accurately matched, the contact 22 is guided to the insulator guide 15 with the expanded entrance, It is that contact of is realized. Similarly, the effect can be obtained by installing the guide 16 in order to guide the traveling wheel 24 of the power supply carriage 20 to the guide rail 12.

  With this configuration, it is possible to realize a lane change that does not affect the skill level of crane operation of the crane operator. In particular, when the crane has a width of 25 m or more, a width of 5 m or more, and a height of 20 m or more, it is very difficult to control in units of several centimeters as a crane operation for aligning the positions of the contact 22 and the power supply rail 11. Therefore, the installation of the insulator guide 15 and the guide 16 is important.

  In addition, you may install the guide 16 not only in the lane change part 6 but in the transition part 7. FIG. With this configuration, since the lane change of the crane 30 can be performed also at the crossover part 7, the cargo handling efficiency of the crane 30 is improved.

  6 and 7 show a lane change state of the crane 30 when the present invention is implemented in the container terminal 2. FIGS. 6 and 7 show a crane power feeding system 1 that is composed of two lanes, a first lane L1 and a second lane L2, each of which is composed of two blocks (4A and 4B, 4C and 4D). Yes.

  A power supply facility 10 is installed on the sides of the first lane L1 and the second lane L2, and a power supply rail 11, a guide rail 12, and a power supply rail cover 13 are installed at locations corresponding to the blocks 4, Only the guide rail 12 is installed at a location corresponding to the portion 7.

  Here, when moving the crane 30 from the block 4B to the block 4A, the crane 30 that has reached the left end of the block 4B switches the power source to the internal power source, and the power supply carriage 20 remains running on the guide rail 12 The right end of the block 4A is reached. After this arrival, contact between the power supply carriage 20 and the power supply facility 10 of the block 4A starts, and the power supply of the crane 30 is switched from the internal power supply to the land power. At this time, since the power supply carriage 20 is traveling on the guide rail 12, it is not necessary to align the power supply facility 10 of the block 4 </ b> A and the power supply carriage 20, and the crane 30 can perform the cargo handling work smoothly.

  As shown in FIG. 7, when the crane 30 is moved from the block 4 </ b> B to the block 4 </ b> D, the power supply of the crane 30 that has reached the right end of the block 4 </ b> B is switched to the internal power supply. And the traveling wheel 24 is removed from the guide rail 12. Thereafter, the lane change unit 6 rotates the direction of the crane 30 by 90 degrees, moves to the second lane L2, rotates the direction of the wheel by 90 degrees again, lowers the power supply carriage 20 onto the guide rail 12, and blocks Proceed to 4D.

  Here, the crane 30 straddles the guide rail 12 on the second lane L2 side of the lane change unit 6. However, since the guide rail 12 keeps the height difference from the ground 3 low, there is a problem in traveling. Not.

  Further, when the power supply carriage 20 comes into contact with the power supply facility 10 of the block 4D, the use of the insulator guide 15 described above facilitates the positioning of the crane 30 or the power supply carriage 20, and the crane 30 is operated flexibly. be able to.

  Note that the above-described lane change can be performed using the crossover unit 7 shown in FIGS. 6 and 7. In this case, it is desirable to install a guide 16 on the guide rail 12 of the crossover part 7.

1 Crane feeding system 2 Container terminal 4 Block (4A, 4B, 4C, 4D, 4E, 4F)
5 Container 6 Lane change part 7 Crossing part 8 Handling part 10 Power supply equipment 11 Power supply rail 12 Guide rail 13 Power supply rail cover 14 Slit 15 Insulator guide 20 Power supply carriage 21 Power supply arm 22 Contact 23 Suspension mechanism 24 Traveling wheel 25 Suspension part ( Lift mechanism)
30 Crane L1 1st lane L2 2nd lane

Claims (6)

In a crane power supply system having a gate-type yard crane for handling a marine transport container, a power supply rail laid along a lane on which the container is placed, and a power supply carriage suspended on the crane,
A cargo handling unit in which the power supply rail is installed along the lane, and a guide rail for guiding the power supply carriage is installed, and
A crossover section in which the guide rails are installed along the lane;
A lane change portion having ends of the power supply rail and the guide rail,
In the cargo handling section, the crane is fed from the feed rail via the feed carriage,
A crane power supply system configured to supply power to the crane from a secondary battery or an engine generator installed in the crane at the lane change section and the crossover section. The conductive portion of the power supply rail is configured to face downward, and an insulator guide is installed at the end of the power supply rail,
The insulator guide is made of an insulator having a semi-cylindrical shape and one expanded,
The crane power supply system according to claim 1, wherein a power supply arm installed upward on the power supply carriage is configured to be guided to the conductive portion via the insulator guide.   The crane power supply system according to claim 1 or 2, wherein the guide rail is configured to have a height at which a vehicle carrying the crane and the container can pass vertically and horizontally on the guide rail.   The crane power supply system according to any one of claims 1 to 3, wherein a guide for guiding the power supply carriage to the guide rail is installed at an end of the guide rail.   Covering the power supply rail with a power supply rail cover in the entire area of the power supply rail installed in the cargo handling section, a slit for passing a suspension part connecting the power supply carriage and the crane passes through a part of the power supply rail cover. The crane power feeding system according to any one of claims 1 to 4, wherein the crane power feeding system is formed. A lane change method for a portal yard crane in the crane power supply system,
A step of ascending the power supply carriage suspended from the crane at the lane change portion by power supply from a secondary battery or an engine generator installed in the crane; and
Moving the crane to a target lane;
Lowering the power supply carriage to the lane change unit and moving the crane along the lane;
Guiding the power supply arm to the power supply rail after guiding the power supply carriage onto the guide rail;
A crane lane change method comprising the step of bringing the power supply arm into contact with the power supply rail and restarting power supply from the power supply rail.

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